升级C3550 ISO

　　1）本机IP 与交换机VLAN 1地址同网段

　　2）开启TFTP，浏览到IOS文件

　　3）删除交换机中的BIN文件及其所在目录

　　Cisco3550BK#dir

　　Directory of flash:/

　　2　-rwx　　　　　 0　 Jan 1 1970 00:01:22 +00:00　env_vars

　　3　-rwx　　　　 344　 Jan 1 1970 00:01:22 +00:00　system_env_vars

　　4　-rwx　　　　 616　 Mar 1 1993 06:05:47 +00:00　vlan.dat

　　5　-rwx　　　　　 5　 Mar 1 1993 04:51:45 +00:00　private-config.text

　　8　drwx　　　　　64　 Mar 1 1993 00:06:05 +00:00　c3550-i9q3l2-mz.121-20.EA1a

　　7　-rwx　　　　4051　 Mar 1 1993 04:51:45 +00:00　config.text

　　Cisco3550BK#cd c3550-i9q3l2-mz.121-20.EA1a

　　Cisco3550BK#dir

　　Directory of flash:/c3550-i9q3l2-mz.121-20.EA1a/

　　9　drwx　　　　2688　 Mar 1 1993 00:03:20 +00:00　html

　　 91　-rwx　　 3447390　 Mar 1 1993 00:04:24 +00:00　c3550-i9q3l2-mz.121-20.EA1a.bin

　　 92　-rwx　　　　 255　 Mar 1 1993 00:04:24 +00:00　info

　　15998976 bytes total (9356800 bytes free)

　　Cisco3550BK#delete c3550-i9q3l2-mz.121-20.EA1a.bin

　　Delete filename [/c3550-i9q3l2-mz.121-20.EA1a/c3550-i9q3l2-mz.121-20.EA1a.bin]?

　　Delete flash:/c3550-i9q3l2-mz.121-20.EA1a/c3550-i9q3l2-mz.121-20.EA1a.bin? [confirm]

　　Cisco3550BK#dir

　　Directory of flash:/c3550-i9q3l2-mz.121-20.EA1a/

　　9　drwx　　　　2688　 Mar 1 1993 00:03:20 +00:00　html

　　 92　-rwx　　　　 255　 Mar 1 1993 00:04:24 +00:00　info

　　15998976 bytes total (12804608 bytes free)

　　Cisco3550BK#del html

　　Delete filename [/c3550-i9q3l2-mz.121-20.EA1a/html]?

　　Cisco3550BK#delete info

　　Delete filename [/c3550-i9q3l2-mz.121-20.EA1a/info]?

　　Delete flash:/c3550-i9q3l2-mz.121-20.EA1a/info? [confirm]

　　Cisco3550BK#delete /force recursive　c3550-i9q3l2-mz.121-20.EA1a

　　Cisco3550BK#archive download-sw /overwrite tftp://10.49.0.4/c3550-i5q3l2-tar.122-25.SEA.tar

　　examining image...

　　Loading c3550-i5q3l2-tar.122-25.SEA.tar from 10.49.0.4 (via Vlan1): !

　　extracting info (252 bytes)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　<omit>

　　!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　[OK - 7748608 bytes]

　　Image info:

　　Version Suffix: i5q3l2-122-25.SEA

　　Image Name: c3550-i5q3l2-mz.122-25.SEA.bin

　　Version Directory: c3550-i5q3l2-mz.122-25.SEA

　　Ios Image Size: 6089728

　　Total Image Size: 7746048

　　Image Feature: LAYER_3|MIN_DRAM_MEG=64

　　Image Family: C3550

　　Extracting files...

　　Loading c3550-i5q3l2-tar.122-25.SEA.tar from 10.49.0.4 (via Vlan1): !

　　extracting info (252 bytes)

　　c3550-i5q3l2-mz.122-25.SEA/ (directory)

　　c3550-i5q3l2-mz.122-25.SEA/html/ (directory)

　　extracting c3550-i5q3l2-mz.122-25.SEA/html/more.txt (62 bytes)

　　extracting c3550-i5q3l2-mz.122-25.SEA/html/menu.css (1654 bytes)!

　　extracting c3550-i5q3l2-mz.122-25.SEA/html/back.htm (435 bytes)

　　extracting c3550-i5q3l2-mz.122-25.SEA/html/images/tab_left_active.gif (852 bytes)

　　extracting c3550-i5q3l2-mz.122-25.SEA/html/images/122353.gif (3132 bytes)!

　　extracting c3550-i5q3l2-mz.122-25.SEA/c3550-i5q3l2-mz.122-25.SEA.bin (6087424 bytes)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　extracting c3550-i5q3l2-mz.122-25.SEA/info (252 bytes)!

　　extracting info.ver (252 bytes)

　　[OK - 7748608 bytes]

　　New software image installed in flash:c3550-i5q3l2-mz.122-25.SEA

　　Configuring system to use new image...done.

　　Cisco3550BK#verify c3550-i5q3l2-mz.122-25.SEA.bin

　　Verified c3550-i5q3l2-mz.122-25.SEA.bin